DatasheetsPDF.com

MAX1775 Dataheets PDF



Part Number MAX1775
Manufacturers Maxim
Logo Maxim
Description Dual-Output Step-Down DC-DC Converter
Datasheet MAX1775 DatasheetMAX1775 Datasheet (PDF)

19-1811; Rev 1; 8/01 KIT ATION EVALU E L B A IL AVA Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers General Description Features o Dual, High-Efficiency, Synchronous Rectified Step-Down Converter o Main Power Adjustable from +1.25V to +5.5V Over 2A Load Current Up to 95% Efficiency o Core Power Adjustable from 1V to 5V Internal Switches Up to 1.5A Load Current Up to 92% Efficiency o 100% (max) Duty Cycle o Up to 1.25MHz Switching Frequency o Input Voltage Range from +2.7V to +2.

  MAX1775   MAX1775



Document
19-1811; Rev 1; 8/01 KIT ATION EVALU E L B A IL AVA Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers General Description Features o Dual, High-Efficiency, Synchronous Rectified Step-Down Converter o Main Power Adjustable from +1.25V to +5.5V Over 2A Load Current Up to 95% Efficiency o Core Power Adjustable from 1V to 5V Internal Switches Up to 1.5A Load Current Up to 92% Efficiency o 100% (max) Duty Cycle o Up to 1.25MHz Switching Frequency o Input Voltage Range from +2.7V to +28V o 170µA Quiescent Current o 5µA Shutdown Current o Digital Soft-Start o Independent Shutdown Inputs MAX1775 The MAX1775 is a dual, step-down DC-DC converter that generates both the main (+3.3V at over 2A) and core (+1.8V at up to 1.5A) supplies for a complete power solution for PDAs, subnotebooks, and other hand-held devices. The main output is adjustable from +1.25V to +5.5V. The core output is adjustable from 1V to 5V. Both switching converters operate at up to 1.25MHz for small external components and use synchronous rectifiers to achieve efficiencies up to 95%. Operation with up to 100% duty cycle provides the lowest possible dropout voltage to extend useful battery life. The MAX1775 accepts inputs from +2.7V up to +28V, allowing use with many popular battery configurations as well as AC-DC wall adapters. Digital soft-start reduces battery current surges at power-up. Both the main and core converters have separate shutdown inputs. The MAX1775 comes in a small 16-pin QSOP package. The MAX1775 evaluation kit is available to help reduce design time. Ordering Information ________________________Applications Hand-Held Computers PDAs Internet Access Tablets POS Terminals Subnotebooks IN 2.7V TO 5.5V (28V IN CASCADE) PART MAX1775EEE TEMP. RANGE -40°C to +85°C PIN-PACKAGE 16 QSOP Typical Operating Circuit IN Pin Configuration TOP VIEW SHDNM 1 SHDNC 2 PGND 3 NDRV 4 CVL 5 IN 6 PDRV 7 CVH 8 16 LXC ON ON CVH INC PDRV OFF OFF SHDNM SHDNC NDRV CVL MAIN 3.3V OVER 2A 15 INC 14 GND REF MAX1775 CS+ CSFBM PGND GND LXC CORE 1.8V 1.5A MAX1775 13 FBC 12 CS11 CS+ 10 FBM 9 REF FBC 16 QSOP ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Dual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers MAX1775 ABSOLUTE MAXIMUM RATINGS IN, SHDNM, CVH to GND.......................................-0.3V to +30V IN to CVH, PDRV ......................................................-0.3V to +6V PDRV to GND..................................(VCVH - 0.3V) to (VIN + 0.3V) PGND to GND .......................................................-0.3V to +0.3V All Other Pins to GND...............................................-0.3V to +6V Core Output Short Circuit...........................................Continuous Continuous Power Dissipation 16-Pin QSOP (derate 7.1mW/°C above +70.


MAX1774 MAX1775 MAX1776


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)